S
M
T
W
T
F
S
26
87°
70°
27
86°
75°
28
87°
75°
29
85°
71°
30
84°
67°
1
67°
54°
2
76°
52°
3
78°
49°
4
79°
53°
5
81°
68°
6
85°
75°
7
78°
61°
8
74°
64°
9
78°
69°
10
86°
67°
11
77°
68°
12
85°
64°
13
89°
63°
14
88°
65°
15
85°
67°
16
85°
68°
17
87°
75°
18
88°
76°
19
89°
66°
20
84°
71°
21
83°
72°
22
83°
73°
23
86°
72°
24
80°
71°
25
84°
72°
26
81°
71°
27
82°
72°
28
85°
73°
29
83°
70°
30
85°
69°
31
85°
71°
1
90°
79°
2
89°
73°
3
86°
73°
4
86°
72°
5
87°
73°
6
85°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Iowa
Iowa's May 2026 forecast shows daily high temperatures ranging from 80° to 90°, with overnight lows between 69° and 79°. The average high for May is 85° with an average low of 72°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Iowa. See also: June | July | August.
